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[Two patients with mumps].

S E van Brummelen1, E de Vries, P M Schneeberger

  • 1Jeroen Bosch Ziekenhuis, Postbus 90.153, 5200 ME's-Hertogenbosch.

Nederlands Tijdschrift Voor Geneeskunde
|August 24, 2006
PubMed
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Two unvaccinated young men contracted mumps, experiencing complications like orchitis and meningitis. The mumps virus strain was linked to previous outbreaks, highlighting potential vaccine failures and rising cases.

Area of Science:

  • Virology
  • Epidemiology
  • Immunology

Background:

  • Mumps, a viral illness, typically presents with parotitis (swollen salivary glands) and can lead to complications such as orchitis (testicular inflammation) and meningitis (inflammation of the membranes surrounding the brain and spinal cord).
  • Vaccination is the primary method for preventing mumps, with widespread immunization programs significantly reducing its incidence in many regions.
  • Despite high vaccination rates in some populations, mumps outbreaks continue to occur, suggesting challenges in achieving and maintaining herd immunity.

Observation:

  • Two male patients, aged 17 and 19, presented with clinical signs of mumps, including parotitis and orchitis; one also had meningitis.
  • Polymerase Chain Reaction (PCR) analysis identified the causative agent as a mumps virus genetically related to strains involved in previous outbreaks in Singapore and The Hague.

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  • Both patients had incomplete vaccination histories, and interestingly, some individuals with confirmed mumps in their regions were fully vaccinated.

    • Findings:

    • Genetic sequencing confirmed the mumps virus in both patients was closely related to a wild-type strain responsible for prior outbreaks.
    • The geographical clustering of mumps cases in the patients' regions suggests localized transmission patterns.
    • The occurrence of mumps in fully vaccinated individuals indicates potential vaccine failure or waning immunity.

    Implications:

    • The findings suggest that factors such as suboptimal vaccination coverage, primary and secondary vaccine failure, and the emergence of genetically diverse mumps virus strains may contribute to the resurgence of mumps.
    • Understanding the genetic relatedness of circulating mumps strains is crucial for effective outbreak investigation and control strategies.
    • Further research into vaccine effectiveness, duration of immunity, and the evolutionary dynamics of mumps virus is warranted to address ongoing public health challenges.